A tidally detached super Neptune on a strongly misaligned retrograde orbit

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Volume 709 (May 2026)

A&A, 709 (2026) L15

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Table H.3.

Priors and outcomes of full modelling.

Parameter	Unit	Prior	Value
TESS s19 jitter ( $σ_{jitter}^{s 19}$ $Mathematical equation: $ \sigma^{\mathrm{s19}}_{jitter} $$ )	ppt	...	0.05±0.01
TESS s20 jitter ( $σ_{jitter}^{s 20}$ $Mathematical equation: $ \sigma^{\mathrm{s20}}_{jitter} $$ )	ppt	...	0.090±0.006
TESS s26 jitter ( $σ_{jitter}^{s 26}$ $Mathematical equation: $ \sigma^{\mathrm{s26}}_{jitter} $$ )	ppt	...	0.056±0.010
TESS s40 jitter ( $σ_{jitter}^{s 40}$ $Mathematical equation: $ \sigma^{\mathrm{s40}}_{jitter} $$ )	e⁻s⁻¹	...	14.4 $_{- 2.2}^{+ 2.2}$ $Mathematical equation: $ ^{+2.2}_{-2.2} $$
TESS s53 jitter ( $σ_{jitter}^{s 53}$ $Mathematical equation: $ \sigma^{\mathrm{s53}}_{jitter} $$ )	ppt	...	0.055±0.010
TESS s60 jitter ( $σ_{jitter}^{s 60}$ $Mathematical equation: $ \sigma^{\mathrm{s60}}_{jitter} $$ )	ppt	...	0.067±0.006
TESS s73 jitter ( $σ_{jitter}^{s 73}$ $Mathematical equation: $ \sigma^{\mathrm{s73}}_{jitter} $$ )	ppt	...	0.056±0.011
TESS s79 jitter ( $σ_{jitter}^{s 79}$ $Mathematical equation: $ \sigma^{\mathrm{s79}}_{jitter} $$ )	ppt	...	0.054±0.009
Uncorr. RV jitter ( $σ_{jitter}^{RV}$ $Mathematical equation: $ \sigma^{\mathrm{RV}}_{jitter} $$ )	m s⁻¹	...	1.4 $_{- 0.3}^{+ 0.4}$ $Mathematical equation: $ ^{+0.4}_{-0.3} $$
Uncorr. RM jitter ( $σ_{jitter}^{RM}$ $Mathematical equation: $ \sigma^{\mathrm{RM}}_{jitter} $$ )	m s⁻¹	...	0.4 $_{- 0.3}^{+ 0.4}$ $Mathematical equation: $ ^{+0.4}_{-0.3} $$
Uncorr. BIS jitter ( $σ_{jitter}^{BIS}$ $Mathematical equation: $ \sigma^{\mathrm{BIS}}_{jitter} $$ )	m s⁻¹	...	2.7±0.6
Uncorr. FWHM jitter	km s⁻¹	...	0.0045±0.0007
RV offset (γ^RV)	m s⁻¹	...	−38814.5 $_{- 2.5}^{+ 1.9}$ $Mathematical equation: $ ^{+1.9}_{-2.5} $$
RM offset (γ^RM)	m s⁻¹	...	−38819.5±0.4
BIS offset (γ^BIS)	m s⁻¹	...	−62.6 $_{- 2.0}^{+ 1.7}$ $Mathematical equation: $ ^{+1.7}_{-2.0} $$
FWHM offset (γ^FWHM)	km s⁻¹	...	7.257 $_{- 0.007}^{+ 0.006}$ $Mathematical equation: $ ^{+0.006}_{-0.007} $$
TESS quad. LD coeff. (u₁)		𝒩(0.42, 0.1)	0.45±0.05
TESS quad. LD coeff. (u₂)		𝒩(0.13, 0.12)	0.08±0.09
TESS s40 c₀		𝒰(38000, 43000)	40285±40
TESS s40 c₁		𝒰(−400, 400)	2±12
TESS s40 c₂		𝒰(−600, 600)	171±113
GP parameters
Rot_Q0		...	0.0010 $_{- 0.0004}^{+ 0.0007}$ $Mathematical equation: $ ^{+0.0007}_{-0.0004} $$
Rot_deltaQ		...	0.26 $_{- 0.07}^{+ 0.10}$ $Mathematical equation: $ ^{+0.10}_{-0.07} $$
Rot_fmix		...	0.0035 $_{- 0.0009}^{+ 0.0013}$ $Mathematical equation: $ ^{+0.0013}_{-0.0009} $$
Rot_σ s19, s20		...	0.0011±0.0002
Norm. factor s19, 20, 53, 60		...	0.978±0.001
Rot_σ s26		...	0.0012±0.0002
Norm. factor s20, 73, 79		...	0.977±0.001
Rot_σ s53		...	0.0013±0.0002
Rot_σ s60		...	0.0008±0.0001
Rot_σ s73		...	0.0017±0.0003
Rot_σ s79		...	0.0015±0.0002
V_c (RV)	m s⁻¹	𝒰(0, 100)	4.1 $_{- 1.0}^{+ 1.5}$ $Mathematical equation: $ ^{+1.5}_{-1.0} $$
V_r (RV)	m s⁻¹	𝒰(−100, 100)	11.3 $_{- 2.4}^{+ 3.1}$ $Mathematical equation: $ ^{+3.1}_{-2.4} $$
B_c (BIS)	m s⁻¹	𝒰(−50, 50)	4.0 $_{- 0.9}^{+ 1.4}$ $Mathematical equation: $ ^{+1.4}_{-0.9} $$
B_r (BIS)	m s⁻¹	𝒰(−50, 50)	−4.0 $_{- 3.2}^{+ 2.7}$ $Mathematical equation: $ ^{+2.7}_{-3.2} $$
L_c (FWHM)	km s⁻¹	𝒰(−0.5, 0.5)	0.013±0.003
Shared polynomial
Poly factor (RV)		...	0.005 $_{- 0.004}^{+ 0.012}$ $Mathematical equation: $ ^{+0.012}_{-0.004} $$
Poly factor (BIS)		...	0.002 $_{- 0.002}^{+ 0.008}$ $Mathematical equation: $ ^{+0.008}_{-0.002} $$
Poly factor (FWHM)		...	0.00001 $_{- 0.00001}^{+ 0.00002}$ $Mathematical equation: $ ^{+0.00002}_{-0.00001} $$
Shared c₂		...	−0.004 $_{- 0.015}^{+ 0.005}$ $Mathematical equation: $ ^{+0.005}_{-0.015} $$
Shared c₃		...	−0.00003 $_{- 0.00006}^{+ 0.00002}$ $Mathematical equation: $ ^{+0.00002}_{-0.00006} $$

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